don't require boardname in blink.py if conf file is in place
don't require boardname in blink.py if conf file is in place

Signed-off-by: Andy Doan <09032574f02f3d5e4e489a718b8705f28c474e94@linaro.org>

96boards/96BoardsGPIO,96boards/96BoardsGPIO,96boards/96BoardsGPIO,96boards/96BoardsGPIO